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adamc@377
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1 (* Copyright (c) 2008, Adam Chlipala
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2 * All rights reserved.
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3 *
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4 * Redistribution and use in source and binary forms, with or without
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5 * modification, are permitted provided that the following conditions are met:
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6 *
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7 * - Redistributions of source code must retain the above copyright notice,
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8 * this list of conditions and the following disclaimer.
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9 * - Redistributions in binary form must reproduce the above copyright notice,
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10 * this list of conditions and the following disclaimer in the documentation
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11 * and/or other materials provided with the distribution.
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12 * - The names of contributors may not be used to endorse or promote products
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13 * derived from this software without specific prior written permission.
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14 *
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15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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25 * POSSIBILITY OF SUCH DAMAGE.
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26 *)
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27
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28 structure PathCheck :> PATH_CHECK = struct
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29
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30 open Mono
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31
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32 structure E = ErrorMsg
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33
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34 structure SS = BinarySetFn(struct
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35 type ord_key = string
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36 val compare = String.compare
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37 end)
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38
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39 fun checkDecl ((d, loc), (funcs, rels)) =
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40 let
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41 fun doRel s =
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42 (if SS.member (rels, s) then
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43 E.errorAt loc ("Duplicate table/sequence path " ^ s)
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44 else
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45 ();
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46 (funcs, SS.add (rels, s)))
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47 in
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48 case d of
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49 DExport (_, s, _, _) =>
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50 (if SS.member (funcs, s) then
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51 E.errorAt loc ("Duplicate function path " ^ s)
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52 else
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53 ();
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54 (SS.add (funcs, s), rels))
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55
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56 | DTable (s, _) => doRel s
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57 | DSequence s => doRel s
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58
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59 | _ => (funcs, rels)
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60 end
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61
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62 fun check ds = ignore (foldl checkDecl (SS.empty, SS.empty) ds)
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63
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64 end
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